Bonjour,

J'aimerai essayer de passer du x(html) en html5
J'ai fait un essai et l'on me dit

là

Sorry, I am unable to validate this document because on line 1 it contained one or more bytes that I cannot interpret as utf-8 (in other words, the bytes found are not valid values in the specified Character Encoding). Please check both the content of the file and the character encoding indication.

The error was: Modification of a read-only value attempted
Cela veut dire quoi ?

d'avance merci